文章基本信息

标题：INVERSI DAN TITIK-TITIK HARMONIS
本地全文：下载
作者：himmawati puji ; Caturiyati Caturiyati
期刊名称：Pythagoras: Jurnal pendidikan Matematika
印刷版ISSN：1978-4538
电子版ISSN：2527-421X
出版年度：2007
卷号：3
期号：1
页码：78-84
DOI：10.21831/pg.v3i1.645
出版社：Universitas Negeri Yogyakarta
摘要：Given a circle centre O and radius r in , the inversion in this circle is the mapping defined by , where lies on the straight line through O and A, and on the same side of O as A, and . It will be investigated the property of inversion related to four harmonic points. The result is that the cross-ratio of any four coplanar points A, B, C, D is invariant under inversion. Hence, the inversion preserves the four harmonic points.
关键词：inversion;cross ratio;four harmonic points.